Again just for information.
My 2000 V70 T5 tailgate lock stopped working, on inspection of the wires between the tailgate & connector block behind the speaker panel, one of the .5mm grey wires had broken in two! I soldered in a section of new wire and hey presto my dog is now happy
I took about 30 minutes in total, and to be honest the hardest part was working out how the trim come off without damaging it